Cutting Siding For Window Trim

Make sure that a drip cap is installed first over the window before going for the hardie siding.

Cutting siding for window trim.

Measure the distance from the inside top of the j channel to the locking tab of the course below and subtract 1 4. Gap for every 18 ft. It s normally a cost cutting measure when done at the corners they don t have to be careful or precise about the corner cut etc. Cutting and installing the siding 1.

Use a carpenter s square to draw the line straight. Below 60 degrees leave a 1 8 in. The windows would be more work imo. See diagram 2e 4a.

How to install window trim mark the length. Where edges of trim meet siding material windows doors or other finished openings leave a minimum 3 16 inch 5 mm space to allow for proper sealing. If you re installing trim in temps higher than 80 degrees f cut pieces to fit tightly. Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located.

Check the fit then cut. Face nail trims using 2 inch 16 gauge finish nails after every 16 inches apart. Cut away the extra siding. You will see the trims lay nice and flat.

Make the line as dark as possible so it s visible when you re cutting it. Lock the notched. Away from the jamb at both ends and along the base. Place the top piece and hold the trim 3 16 in.

Exterior trim over siding i have never seen it on window door trim but seen plenty on door window trim. Get the spacing right. If it s between 60 and 80 degrees leave a 1 16 in. Do not miter corner joints of band boards fascia corner trim etc.

When installing window molding start at the top. Provide increased spacing along the trim if specified by the siding application instructions. If you re cutting dark vinyl siding use chalk or light colored tape to mark the line you want to cut. After installation cover the gap with acrylic or urethane caulk.

Using a circular saw set to the right depth just a hair shallower than our siding to ensure we didn t break through the house wrap or wall and a brace to ensure a straight cut we cut away the extra siding from around our window frame. Touch up the divided hardie trim boards before trimming them to your window.